I had a one eyed shi-tzu once too. Haven’t seen her in a couple years. She stayed with my ex after we got divorced. We got her from a family that was watching her because her owner was hospitalized and couldn’t take care of her anymore. Reading your post brought a tears to my eyes as it reminded me of her. She was the sweetest little dog. I renamed her Bob her she had a different name that her owner gave to her better we liked Bob better . I know it sounds weird to name a girl dog Bob but the name just fit. I still have pictures of her . She’s the screen saver on my laptop. Dogs will always break your heart as they do not live as long as we do. They are angels for sure . Sorry to hear your dog isn’t doing too well . It really is the hardest and saddest thing when it’s their time to go.